Re: Vizio VP50 Smoked
Could not upload the video. Sorry!
aheliason
Returned Member
Last Activity: 07-01-2013, 10:28 PM
Joined: 12-12-2010
Location: Mashpee, (Cape Cod), MA
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Re: Vizio VP50 Smoked
Here is a parts placement video I made after the repair was complete.Last edited by aheliason; 07-01-2013, 09:56 AM.Leave a comment:
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Re: Vizio VP50 Smoked
I am a very happy camper! The Vizio VP50 is up and running. The runs to the two 10 ohm 1W resistors had burned off. Since the board itself had been damaged and removing the resistors also removed the remaining plate-through in the pcb, I secured the new resistors with gold jewler's beads on each side. New wire runs were constructed using one of the resistor leads at each end (the resistors are in parallel). One to the diode D5600 and the other to an area of pcb run that was not burned. That, it turns out, was all that was needed to repair the Y-Main. I had...Leave a comment:
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Re: Vizio VP50 Smoked
Update: Thanks to help from you members I now have what I think is a repaired Y-Main a set of buffer cards on order. I will check back in after they arrive and let you all know how the job is progressing. If all is well, I would like to do a video at that time outlining what I have learmed. I believe YouTube is probably the best place to post that with a link to it here. In the meantime, feel free to add any comments to this thread. Andy E (Old Sea Dog)Leave a comment:
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Re: Vizio VP50 Smoked
[url]https://www.youtube.com/watch?v=WB238KaaHVA&feature=youtube_gdata_player[/url]
It worked for me, too. Repaired the runs and replaced the resistors. I have raster over the bottom half of the screen. Tomorrow, I'll try to get some signal to it. Anyone got a top buffer for sale?Re: Vizio VP50 Smoked<br /> <br /> ...of the screen.Leave a comment:
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Re: Vizio VP50 Smoked
Hi TW, A few days ago I found a video in which someone used that method. In fact, he started with the same set of resistors cooked as I have. Sorry to say that I can't seem to find the video again. I can not recall if it was the top or bottom board that the person was testing but he did show the set on with just half the screen active with one board out, so I'll give it a shot. If anyone has tried this then please comment. ThanksLeave a comment:
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Re: Vizio VP50 Smoked
I have used the diode fwd/rev method to check all the semiconductors on the Y-main. Nothing seems out of the ordinary. Note that two of the devices on the longer heatsink look like transistors, but are dual diodes. The top Y buffer measures bad with very low resistance in both directions across V+ to Gnd. I plan to rebuild the burned runs and replace the two parallel 10 ohm resistors, then reassemble and power up, briefly, with the top buffer removed. If I get any raster and the resistors stay relatively cool then I'll probably just replace the top buffer board....Leave a comment:
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Re: Vizio VP50 Smoked
Update. The two 10 ohm resistors R5600 & R5610 were intact but the pcb runs to them were totally gone and the board quite blackened beneath where the runs had been. It's no wonder it smelled so bad! To my surprise, the diode D5600 is good. I have yet to find a schematic of the Samsung Y Main and the buffer cards so if anyone can help with that, please post a link.Leave a comment:
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Re: Vizio VP50 Smoked
Tom, Success. I had not noticed the positioning ferruls on the inside set of stand-offs. Lifted first one end of the board then the other and it seemed free, but when I let go of the board one or the other of the screw holes caught on the post. Live and learn..Leave a comment:
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Re: Vizio VP50 Smoked
I am ready to remove the Y main card from the upper and lower drivers (buffers). The Tyco edge connectors seem very tight. Is there a release method or should I just pry harder? By the way, I have reviewed several of the repair videos and think this is certainly worth a try, given that I have more spare time than spare money..Leave a comment:
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I finally figured it out. The main site uses a separate set of login credentials. I needed to come to the /forum URL. I humbly suggest that it could be made clearer on the main page. -
Re: Vizio VP50 Smoked
TW2005, yes,exactly, I have just posted two photos.Leave a comment:
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Re: Vizio VP50 Smoked
Larger image....Leave a comment:
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Re: Vizio VP50 Smoked
Per the request of Tom66, here are photos of the back. It sounds as if he understood which board correctly. This will be my first try at posting photos so if I fail, please bear with me!...Leave a comment:
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Vizio VP50 Smoked
Hello Badcaps moderator & members. I am back with a new problem. My VP50 has lost all raster and shortly thereafter, there was the acrid smell of burned resistor(s). After careful inspection, the only burned components seem to be R5000, R5010, and possibly D5000 on the board in the left center (from the rear view) which has three large heat sinks. The two resistors appear to be 1 watt and are located at the left center of the card beneath an electrolytic and a ceramic cap.
To get started, can anyone with access to schematics tell me if this looks like a real bad situation or... -
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Re: Fix for Benq FP737s 17" (Q7T3)
[FONT="Arial"][COLOR="black"][COLOR="Red"]Season's [/COLOR][/COLOR][COLOR="Green"]Greetings![/COLOR] I am joining this thread at the suggestion of senior member "retiredcaps," who replied to my first inquiry. My repair efforts on a Benq Q7T3 are continuing at this time because today was a "Smoke day!" Here is a recap: The monitor first failed with totally dark screen but normal power lights. The green power led would go on and change to yellow if the computer was turned off or the...Leave a comment:
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Re: Benq FP737S - Q7T3
Thank you for the link to the discussion. I found the schematic referred to on page 2 as "Benq Inverter Schematic" to be very similar to my Q7T3 PCB. The component designators match up but all the 500 series are unpopulated on my board. To start with I'm replacing all the 470 and 1000 ufd electrolytics with 35 volt 105 degree ones. Also will resolder the xfmrs, as you suggested. Will let you know how this works out.Leave a comment:
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Re: Benq FP737S - Q7T3
Benq Q7T3. I've replaced the blown 3A SB fuse. Unit ran for about two days then blew the fuse again. Now I've pulled the 470 and 1000 uf electrolytics. Trouble is, I mixed them up by mistake. Anyone have a parts placement or schematic? This new member needs some help! Thanks.Leave a comment:
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